SOLUTION: verify the idenity sec^4x – sec^2x = tan^4x + tan^2x''

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Question 433555: verify the idenity
sec^4x – sec^2x = tan^4x + tan^2x''
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!

To do this one we need the identity 
 and its rearranged version 



Factor common factor  out of the left side



Replace the first factor on the left, , by 

Replace the second factor on the left,  by 




Multiply the left side out:



Reverse the terms on the left



Edwin
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